Apparatus for spraying



May 19, 1931.

c. D. COLLINS 1,806,192 APPARATUS FOR SPRAYING Filed Au 21, 5

mama-5 0. cow/v3;

INVENTOR.

ATTORNEY.

Patented May 19, 1931 UNITED STATES PATENT OFFICE- CHARLES D. COLLINS,OF NEW YORK, N. Y., Assreivon TO AMERICAN CYANAMID ooM- PANY, OF NEWYORK, N. Y., A oorc-rona'rron or MAINE APPARATUS FOR SPRAYINGApplication filed August 21, 1925. Serial .No. 51,560.

This invention relates tospraying, more particularly to the spraying ofvolatile liquids which vaporize and act as fumigants.

The use of liquids as fumigants, such as l quid hydrocyanic acidormixtures containing the same,.is of growing importance, be ing used,in the fumigation of ships, warehouses, factories, rooms, trees and thelike. Various types of apparatus for applying the ;-.me have beendevised and are in use, and among them is the apparatus described andclaimed in my' copending application Serial No. 29,639, filed May 11,1925, for ship fumigating apparatus. Because of the construciion thereofit is possible to accurately meas ure out either large doses orcomparatively small doses of the fumigant, and it has gone intoextensive use on-ships, since asingle niece of apparatus was madeapplicable both to the largest hold and to the smallest stateroom.

My present invention is designed to provide another type of apparatusfor fumigating purposes which is difierent from that set urth in mycopending application above identified, it being among the objectsthereof to devise an apparatus therefor which shall be efficient,flexible in that it shall allow of the accurate and rapid measurement ofgreat- 'ly varying doses, and whichshall involve. a minimum amount ofskill and effort on the part of the operator.

In practicing my invention I provide a container for the fumigant, whichmay befa iiquid mixture containing about 20% cyanogen chloride inhydrocyanic acid, and secure thereto a'source of pressure, such as ahand operated air pump. The liquid outlet pipe of the containerterminates in a nozzle, Lhrough which the fumigant is sprayed under thepressure Within the container, the said pressure being maintainedapproximately constant, generally not varying more than say five pounds,whereby the volume of ;iquidpassing through the nozzle is constantwithinvery narrow limitshyThe nozzleis normally closed by a spring-pressedvalve provided with an operating handlewhich is connected to anindicator mechanism for determining the amount of liquid passing andcausing va pointer attached thereto to move over a scale whichiscalib-rated as desilred toindicate dosage delivered by the nozz e.livered the operator releases the handlewhich shuts off the flow offumigant and stops the movement of the escapement mechanism. Theapparatus, Without further manipulation by the operator, is ready foranotherop eration. 4 7

In the accompanying'drawings constituting a part hereof and in whichlike reference characters indicate like parts:

Fig. 1 is a side elevational view of my new apparatus, some parts beingbroken away for clearness; i

Fig. 2 is a cross-sectional view taken along the line IIII of Fig. 1,and

Fig. 3 is a plan view of the combined valve and closure for thecontainer.

The container 1 is provided with a cover 2 which is threaded into placeto make a leak proof joint and has an opening on one side thereof towhich is connected tubing 3' provided with a spring-pressed air valve ofwellknownconstruction, the fore end of tubing 3 being connected with thehand operated air pump 4. An air pressure gauge 5 is threaded into thetop of the cover 2, a cap 6 closes an opening in the said cover, and, apalr of extensions 7 thereon;c0nstitute-handles to facilitate removalthereof. A valve 8 is adapted to close offpipe 9'which extends to thebottom of the container or cylinder, and tubing 10'is connect-ed to'thecover so' that fluid from pipe'9 may flow therethrough when normallyclosed by a spring-pressed valve 18 within the casing 14, whichc'arriesa rearwardly extending projection let, An oper- When'the proper amounthas been'deating handle is pivoted to projection 14 at point 16, and hasa projection 17 extending into a slot in the stem 18 of the valve 13. Alever 19 pivoted to the handle 15 is suitably secured to a member 20adapted to operate a latch within the casing. 21 of the indicator.

.The indicator generally includes an escapement mechanism or clockworkwhich is actuated by a coil spring and the movement of which iscontrolled by a latch, as is wellknown in the construction of'clockmechanisms. The indicator casing 21 is secured-to pipe 11 by band 22 andit is provided with a key 23 for placing the coil-spring under tension.'A pointer 24 is secured to the clockwork andis adapted-to move-over theface of T a dial 25: V v

Theoperation of the device is as follows: The container 1 may be filledwith liquid by removing the tubing 1O opening'valve' 8 andsecuring inplace of 'said tubing ahose connected to the source ofliquid' which isgenerallyof a toxic character. Cap 6'is'removed and a hose is connectedthereto leadi ingto a distant point to act asa vent during Liquid iscaused to the? filling; operation. fiow'into thecontainer 1 to thedesired point, after which the-connection with the source of liquid isbroken and the cap 6 and tubing IO-"arereplaced; Valve 8 is -closed andthe pump 4 isactuateduntil the gauge- 5 shows that-theipressure withinthe container 1- been built up to the desired point, say 25'topounds; Inorder tofumigate with the apparatus; the operator opens-valve 8,graspsthe dial 2 5. Thedial isicalibrated so that each completerevolution of the pointer 24:

indicates a unit of liquid passing through the at'or merely notes"the-number of revolutions and without any calculation determinesthenumber of units whiclrhave been ejected into the 'spac'e being.fumi'gated 'and then releases the handle, thereby cuttingolf thefurther flow of liquichL-an'd at the'same'time stopping" the revolutionof the=poi'nte1"24'. Without any further manipulation the apparatus isready foranother' fumigation, which is accoinplishe'd merel -bypressingnfthe handle 15:" Only periodically is it necessary to op *eratethe pump 4, since the pressurein the" container" does not vary greatlyand only a few strokes of'the pumpatrather infrequent intervalsareneeessary tokeep the pressure within the desired ilimits.

Myrinvention provldes' an apparatus which is comparatively inexpensiveinasmuch as it utilizes parts of simple construction, most of which arestandard and may be readily obtained at low cost. It is an easy matterfor the operator to manipulate the apparatus as all he is'requ-iredto'do is to give the pump a few strokes to'bring the=pressurein the"container up to the required point, after which a number of fumigationsmay be made until the pressure in the container has dropped, say five toten pounds. The act of fumigation is extremely simple; the operatormerely presses the handle and counts the number of revolutions of thepointer or the units onthe dial that it passes and he thus obtainstheproper dosage.- The" measurement a of the doses is rapid and accurateand no errors creep in regardless of the size of'the' dose;

which mayva'ry within 've'rywide limits; It will be seen that theoperation of this apparatus requiresverylittle skill; eifort'orintelligence on the part of the operator.

Although Ih'ave described my invention giving' a detailed description ofan apparatus for fumigating; my invention i's not limited tothesed'etails vari'ofu s changes may 0bviou'sly be made therein withindeparting from theprinciples set forth; For instance,- a different typeof' operatin "means for the spring pressed' valve may be used an'd'theirrdi'cator mechanism may beoperated by other than a direct"eon'neetion' with "thehandle and even independently thereofbut 'simuh"taneously therewith: The indications need" notb'e given-by a pointermovingfoventhe face of adial, but some other type of signal maybe given,a for example; the movement of theescapem'ent mechanism may periodicallysound abell or the like. Implaceof-"an air pump, one may use a cylindercontaini lig 'air or'oth'er ga's under high pressure and connect thesameto thecontarnerthrough regulat= in}; or af reducing valve-whichWill'giye the desired constant pressure on the 7 liquid. Theseand otherchanges maybe-'made in my invention, thescop'e of which is defined inthe claims appended hereto. nozzle under the given pressure. The oper-WhatI'claim is: i p

1. Apparatusfor spraying which c'om-' prises a" container for liquid;means for" pla'cingpressure thereon, a spray nozzle connect ed to saidCOIlt'flillIGft-O re'c'eiveliq'uid there from, means for c'ontroliing-thefiow'of liquid through sald nozzle, and-means actuated by forforcontrolling the fl'owof liquid thrnugn: said nozzle,- and an indicatoractuated "bythe" movement 1 of said handle for indicating-the amount-0fliquidflowing through said nezzlei 3. Apparatus for spraying whichcomprises a container for liquid, means for placing pressure thereon, aspray nozzle connected to said container to receive liquid therefrom, avalve and an operating handle therefor for controlling the flow ofliquid through said nozzle, and an indicator containing clockworkadapted to be released by the movement of said handle for indicating theamount of liquid flowing through said nozzle.

4. Apparatus for spraying which comprises a container for liquid, meansfor placing pressure thereon, a spray nozzle connected to said containerto receive liquid therefrom, a valve and an operating handle thereforfor controlling the flow of liquid through said nozzle, and an indicatoradapted to be actuated by the movement of said handle during the periodwhen liquid is flowing through said nozzle to indicate the amountthereof.

In testimony whereof, I have hereunto subscribed my name this 14th dayof August,

CHARLES D. COLLINS.

